﻿#region Copyright (c) 2003 - 2008, Andreas Mueller
/////////////////////////////////////////////////////////////////////////////////////////
// 
// Copyright (c) 2003 - 2008, Andreas Mueller.
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// which accompanies this distribution, and is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// Contributors:
//    Andreas Mueller - initial API and implementation
//
// 
// This software is derived from software bearing the following
// restrictions:
// 
// Copyright (c) 1994
// Hewlett-Packard Company
// 
// Permission to use, copy, modify, distribute and sell this software
// and its documentation for any purpose is hereby granted without fee,
// provided that the above copyright notice appear in all copies and
// that both that copyright notice and this permission notice appear
// in supporting documentation.  Hewlett-Packard Company makes no
// representations about the suitability of this software for any
// purpose.  It is provided "as is" without express or implied warranty.
// 
// 
// Copyright (c) 1996,1997
// Silicon Graphics Computer Systems, Inc.
// 
// Permission to use, copy, modify, distribute and sell this software
// and its documentation for any purpose is hereby granted without fee,
// provided that the above copyright notice appear in all copies and
// that both that copyright notice and this permission notice appear
// in supporting documentation.  Silicon Graphics makes no
// representations about the suitability of this software for any
// purpose.  It is provided "as is" without express or implied warranty.
// 
// 
// (C) Copyright Nicolai M. Josuttis 1999.
// Permission to copy, use, modify, sell and distribute this software
// is granted provided this copyright notice appears in all copies.
// This software is provided "as is" without express or implied
// warranty, and with no claim as to its suitability for any purpose.
// 
/////////////////////////////////////////////////////////////////////////////////////////
#endregion


using System;
using System.Collections;
using NStl.NUnit.Support.SupportTests;
using NUnit.Framework;

namespace NStl.NUnit.Support
{
    [Obsolete("Use NUnit CollectionAssert.Instead!")]
    static class NStlAssert
    {
        public static void IsEmpty(IEnumerable e)
        {
            
            if(e.GetEnumerator().MoveNext())
                Assert.Fail("Collection is not empty but was expected to be empty");
        }
        public static void IsNotEmpty(IEnumerable e)
        {
            if(!e.GetEnumerator().MoveNext())
                Assert.Fail("Collection empty but was expected to be not empty");
        }
        public static void AreEqual(IEnumerable lhs, params object[] rhs)
        {
            AreEqual(lhs, (IEnumerable) rhs);
        }
        public static void AreEqual(IEnumerable lhs, IEnumerable rhs)
        {
            AreEqual(lhs.GetEnumerator(), rhs.GetEnumerator());
        }
        
        private static bool MoveNext(IEnumerator lhs, IEnumerator rhs, ref bool l, ref bool r)
        {
            l = lhs.MoveNext();
            r = rhs.MoveNext();
            return l && r;
        }
        public static void AreEqual(IEnumerator lhs, IEnumerator rhs)
        {
            if (ReferenceEquals(lhs, rhs))
                return;

            bool l = false;
            bool r = false;
            while (MoveNext(lhs, rhs, ref l, ref r))
            {
                if (!Equals(lhs.Current, rhs.Current))
                    throw new RangesDifferInContentAssertionException(lhs.Current, rhs.Current);
            }

            if (!l && !r)
                return;

            if (!l && r)
                throw new RhsIsLongerThanLhsAssertionException();

            if (l && !r)
                throw new LhsIsLongerThanRhsAssertionException();
        }
    }
}
